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Metabolite Analysis of Alternaria Mycotoxins by LC-MS/MS and Multiple Tools

文献类型： 外文期刊

作者： You, Yanli 1 ; Hu, Qinghua 1 ; Liu, Nan 1 ; Xu, Cuiju 1 ; Lu, Sunan 1 ; Xu, Tongcheng 2 ; Mao, Xin 1 ;

作者机构： 1.Yantai Univ, Coll Life Sci, Yantai 264005, Peoples R China

2.Shandong Acad Agr Sci, Inst Food & Nutr Sci & Technol, Jinan 250100, Peoples R China

关键词： Alternaria; modified mycotoxins; metabolic pathway; molecular networking; feature-based molecular networking

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：4.9 ）

ISSN：

年卷期： 2023 年 28 卷 7 期

页码：

收录情况： SCI

摘要： Alternaria fungi are widely distributed plant pathogens that invade crop products, causing significant economic damage. In addition, toxic secondary metabolites produced by the fungi can also endanger consumers. Many of these secondary metabolites are chemically characterized as mycotoxins. In this study, Q Exactive Orbitrap mass spectrometry was used for the non-targeted analysis of the metabolome of seven Alternaria isolates cultured on Potato Carrot Agar (PCA), Potato Dextrose Agar (PDA) and Potato Sucrose Agar (PSA) medium. Due to the difficulty of detecting modified toxins, an analytical strategy with multiple visual analysis tools was also used to determine the presence of sulfate conjugated toxins, as well as to visualize the molecular network of Alternaria toxins. The results show that PSA medium exhibits more advantageous properties for the culture of Alternaria, with more toxigenic species and quantities and more obvious metabolic pathways. Based on high-resolution tandem mass spectrometry (MS/MS) data, the mycotoxins and their metabolites were mainly clustered into four groups: alternariol (AOH)/alternariol monomethyl ether (AME)/altenusin (ALU)/altenuene (ALT)/dehydroaltenusin (DHA)/Desmethyldehydroaltenusin (DMDA) families, Altertoxin-I (ATX-I) family, tentoxin (TEN) family and tenuazonic acid (TeA) family. Moreover, the PSA medium is more suitable for the accumulation of AOH, AME, ALU, ALT, DHA and DMDA, while the PDA medium is more suitable for the accumulation of ATX-I, TEN and TeA. This research may provide theoretical support for the metabolomics study of Alternaria.

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